Reland of Do not remove write barriers for stores of old space references in most recent old space allocation. (patchset #1 id:1 of https://codereview.chromium.org/1482973003/ )

Reason for revert:
Suspect for crashing found, relanding for canary coverage.

Original issue's description:
> Revert of Do not remove write barriers for stores of old space references in most recent old space allocation. (patchset #1 id:1 of https://codereview.chromium.org/1478113002/ )
>
> Reason for revert:
> Broken canary. Trying to find out root cause.
>
> Original issue's description:
> > Do not remove write barriers for stores of old space references in most recent old space allocation.
> >
> > BUG=chromium:561449
> > LOG=n
> >
> > Committed: https://crrev.com/369778ec55a63ebe51e8fa8497edb5b681069b9b
> > Cr-Commit-Position: refs/heads/master@{#32368}
>
> TBR=ulan@chromium.org,bmeurer@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=chromium:561449
>
> Committed: https://crrev.com/da56525478f1820e3da629576ab61acc5f84daac
> Cr-Commit-Position: refs/heads/master@{#32406}

TBR=ulan@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:561449

Review URL: https://codereview.chromium.org/1493313002

Cr-Commit-Position: refs/heads/master@{#32555}